Throne room not meeting the requirements

[Tomoko]

I've googled for several minutes and yet I can't find anything relating to this. most people have issues with floors, but I've swapped out floors with several things and can't find any solution there.

My colonist is (going to be) a Countess. The ingame requirements for throne rooms aren't listed properly, so I followed the wiki of requirements. I've matched these perfectly, yet clicking the throne tells me it apparently only matches "Praetor".

The room is 9 squares by 9 squares, which last I checked, is 81 squares. That would mean it fits the requirement of size fine. Just in case certain buildings block "tile sizes" or something, I extended it yet it still says praetor.

The only non-throne room items in there are four lights, a heater, and pieces of artwork.

I'm completely lost. Help?

[Tomoko]

UPDATE: I've used god mode to create a completely new, separate room in an isolated area, exceeding the requirements by far much further than my actual room. Yet, despite this, it STILL only fits "Praetor".

[Tomoko]

Final update: Turns out the "recreation piano" is not the same type that I was thinking of. I actually need that hidden piano that needs to be researched and created.

[Kittenpox]

Harp -> Harpsichord? Those may require research in order to be produced, yeah.

The floors thing is usually that you don't have the 'Fine' version of tiles/carpets, but that's not relevant until higher-tier Titles.

The thing that usually gets mine is the Impressiveness, which gets reduced by dirt tracked in onto the floors which brings the beauty levels down below the required threshold.